Harvesting World - North America's Premiere Used Combines trade area covers Nebraska, North and South Dakota, Minnesota, Wisconsin and the western two-thirds of Iowa, 32 HARVESTING WORLD store locations throughout the Midwest provide quality used John Deere, CASE-IH, LEXION, or Gleaner combines. Requirements: iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5.